Really depends on your husbandry level, and your bio load. No offense you sound a bit new to the reef tank world. What is your WC schedule? Have you kept salt water tanks before? Soft Corals, Lps? If the answer is no, I would stay FAR away from SPS at least until you've been in the hobby for a year or so...or you will just be throwing money down the toilet. Do so reasearch online, read all the sticky's.. really get a good understanding of the requirements of SPS. You're talking stronium, Molybednum, all of which you don't need to dose w/regular water changes. Are you testing for these things? You need to get the basics on lock first before you can even think about SPS.. Salinity, Temp, Alkalinity, Calcium, Magnesium, Nitrate, and Phosphates.